I had three five gallon buckets of .223/5.56 brass to remove the primer crimps on and didn't have or use the Dillon or similar type unit. I was too cheap to buy the Dillon unit and ended up trying many hand held units.
1. The CH4C unit will bend the rims of your cases because the case is only supported by the rim and not a pin pressing against the web of the case. (NFG)
2. I have a 1976 RCBS press mounted unit but the swage pushes brass into the primer pocket and requires reaming to clean up the primer pocket. As you can see it is a bit rough and hard to find the mouth of the case you can't see inside the die. (below average) and the quality varies.
What I found to be the best for removing the crimp by hand after tying many hand held reamers was the RCBS crimp remover made for their case prep station. This unit will only remove the crimp and not touch the primer pocket walls because it is tapered. When the crimp is removed the base of the case hits the face of the reamer and stops, meaning "NO" over reaming.
To speed up the operation I used the Hornady case prep trio, I hit the crimp with the VLD reamer and followed up with the RCBS reamer. The Lyman reamer was just used as a GO NO-GO gauge, if it fit in the primer pocket the crimp was removed.
If you mount the RCBS reamer in a battery powered drill that spins faster than the Hornady case prep trio your reaming will go much faster. And anything you do by hand will cause sore hands and fingers if large quantities are done.
Bottom line, if your only doing a few cases (100 or less) the RCBS reamer works the best, if you have a lot of cases then buy the Dillon unit and save having sore hands and fingers. I was also uniforming primer pockets and flash holes at the same time and ended up with very sore fingers.